Study of effect of 4 hexylresorcinol antioxidant on blackspot of cultured Shrimp (Litopenaeus vannamei) in freezing

This project was carried out in order to Study of possibity of uses from 4 hexyresorcinol for prevention of melanosis in cultured shrimp. Treatments including of samples processed with 0. 15% concentration of 4 hexylresorcinol and control samples. The samples were kept at -18oC. Bacterial، chemical and sensory examinations were carried out for a period of six months. Statistically significant difference was observed in peroxide value، free faty acids، thiobarbotouric acid and trimethylamin in test samples compared with the control samples during storage period.